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Rotary limit switch

The rotary limit switch is used to control the movement of
industrial machinery. It operates as an auxiliary controller of
electrical motors through a power interface, such as a contactor
or PLC. Its shaft can be connected to the motor and, after a
set number of revolutions, the cams operate the switches, thus
starting the predetermined movement.

A worm gear and a helical toothed gear combined with one or
more pairs of straight toothed gears are used for the transmission
of the movement from the input shaft to the output shaft.

Revolution ratios ranging from 1:15 to 1:150 result from the use
of different combinations of gear wheels between the input shaft
and the output shaft, which is connected to the cams operating
the switches.

Overall dimensions are suitable for assembly in narrow spaces.

Transmission and gear driving shafts are made of stainless steel
to prevent oxidation and wear. The gear wheels and the driving
bushes are made of self-lubricating techno-polymer material,
suitably chosen to reduce the wear to a minimum and to maintain
the accuracy of the couplings over time. Sintered bronze bushes
are moulded into the base of the limit switch to optimise the shaft
rotation and to prevent rubbing with plastic material.
Materials and components are wear resistant and protect the
equipment against water and dust. The limit switch can be
customized with labels and colors.

Each cam can be set with great accuracy thanks to the cam
adjusting screws. The auxiliary switches are of the positive
opening type.The limit switch is available with direct control
switches to operate directly on the motor.